CN216867008U

CN216867008U - Novel electronic vacuum pump

Info

Publication number: CN216867008U
Application number: CN202122615854.9U
Authority: CN
Inventors: 胡君晓
Original assignee: Zhejiang Xierfu Electric Co ltd
Current assignee: Zhejiang Xierfu Electric Co ltd
Priority date: 2021-10-28
Filing date: 2021-10-28
Publication date: 2022-07-01
Anticipated expiration: 2031-10-28

Abstract

The utility model discloses a novel electronic vacuum pump, which comprises a base, wherein a motor is arranged at the lower end of the base, a pump block is arranged at the upper end of the base, a cavity is formed in the inner part of the pump block, a rotor is arranged in the cavity, the rotor is connected with a rotating shaft through a connecting piece, the motor drives the rotating shaft to rotate, the cross section of the cavity is oval, a plurality of slots are distributed on the circumferential surface of the rotor, rotary vanes are movably inserted in the slots respectively, an air outlet is formed in the upper end of the pump block, an air inlet is formed in the lower end of the pump block, an upper outer cover is arranged on the upper end of the base, a lower outer shell is arranged on the lower end of the base, the motor is positioned in the lower outer shell, and a carbon brush of the motor is close to the lower end of the lower outer shell. According to the novel electronic vacuum pump, the motor carbon brush is far away from the working high-temperature area, heat generated during the operation of the vacuum pump is not easy to transfer to the motor carbon brush, the carbon brush frame cannot be deformed, the turn-to-turn short circuit or the blocking of a motor coil cannot be caused, and the continuous working time and the service life of the electric vacuum pump are prolonged.

Description

Novel electronic vacuum pump

Technical Field

The utility model belongs to the technical field of vacuum pumps, and particularly relates to a novel electronic vacuum pump.

Background

For an electric automobile, an engine is replaced by a motor, and a vacuum source for a booster is unavailable, namely the boosting effect cannot be generated; obviously, the vacuum booster cannot provide necessary boosting guarantee for the driver, and the safe running of the electric automobile becomes a problem which needs to be solved. The electric vacuum pump can well solve the problem through the detection of the sensor and the logic judgment. The use of the electric vacuum pump can ensure that the vacuum degree in the booster is maintained at a certain level, thereby providing good braking efficiency and ensuring the driving safety for the automobile.

The existing electric vacuum pump can be divided into three types according to the structural difference: diaphragm, rotary vane, and rocking piston. The diaphragm vacuum pump has large vibration, large volume and high price; the piston type vacuum pump has poor performance, large power consumption and large noise; the rotary-vane vacuum pump has the advantages of small volume, no need of consuming energy of an engine, stable performance and the like, and is a preferred product for a small-displacement car and a hybrid power below 1.8T in the future, and the pure electric vehicle meets the future light-weight new technology, new process and new trend of the vehicle.

In the existing rotary-vane vacuum pump, a motor and a base are basically riveted together, and a carbon brush of the motor is positioned in the base and above a motor coil and is close to a high-temperature area. During the operation of the vacuum pump, the graphite rotor and the rotary vane can generate a large amount of heat through dry friction with the stainless steel cavity, the heat is quickly transmitted to the carbon brush of the motor, the carbon brush frame can deform due to long-time continuous operation, and the abraded graphite ash of the carbon brush of the motor can easily fall into the motor coil to cause turn-to-turn short circuit or blocking of the motor coil, so that the vacuum pump is caused to lose efficacy.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problems, the technical scheme adopted by the utility model is as follows: a novel electronic vacuum pump comprises a base, a motor is arranged at the lower end of the base, a pump block is arranged at the upper end of the base, a cavity is formed in the inner part of the pump block, a rotor is arranged in the cavity and connected with a rotating shaft through a connecting piece, the motor drives the rotating shaft to rotate, the cross section of the cavity is oval, the center of the cavity is positioned on the axis of the rotating shaft, a plurality of slots are uniformly distributed on the circumferential surface of the rotor, rotary vanes are movably inserted in the slots respectively, an air outlet communicated with the cavity is formed in the upper end of the pump block, an air inlet communicated with the cavity is formed in the lower end of the pump block, an air inlet pipe and an air outlet pipe are connected to the base, the air inlet pipe is communicated with the air inlet, an upper outer cover is arranged on the upper end of the base, the pump block is positioned in the upper outer cover, the air outlet pipe is communicated with the inner part of the upper outer cover, the base lower end cover has the lower casing, and the motor is located the lower casing, and the motor includes the carbon brush, the carbon brush is close to the lower extreme of lower casing.

Preferably, the pump block includes a ring body, an upper cover covers the upper end of the ring body, a lower cover covers the lower end of the ring body, the air inlet is located on the lower cover, and the air outlet is located on the upper cover.

Preferably, the upper outer cover is internally provided with a silencing coil which is coaxial with the rotor, and the silencing coil is clamped between the upper outer cover and the upper cover.

Preferably, as above-mentioned technical scheme, accompany sealed pad and sealing washer between lower cover and the base, sealed pad and sealing washer are coaxial, form the chamber of admitting air between sealed pad and the sealing washer are coaxial, and air inlet and intake pipe communicate the chamber of admitting air respectively.

Preferably, the lower end of the upper outer cover is placed on the sealing gasket.

Preferably, the base is connected with the lower end of the upper outer cover through a plurality of screws, the upper end of the lower outer cover is connected with the base through a plurality of screws, the pump block is fixedly connected with the base through a plurality of screws, and the screws connecting the pump block and the base are sequentially connected with the upper cover, the ring body and the lower cover.

Preferably, the two sides of the base are respectively provided with mounting lugs, the mounting lugs are provided with mounting holes, and shock absorbing pads are mounted in the mounting holes.

Preferably, the base is connected with a plug connector, and the motor is connected with a power supply through the plug connector.

The utility model has the beneficial effects that: according to the novel electronic vacuum pump, the motor carbon brush is positioned at the bottom of the lower shell and is far away from a working high-temperature area (the base and the pump block), heat generated during the operation of the vacuum pump is not easy to transfer to the motor carbon brush, the carbon brush frame cannot be deformed, graphite ash abraded by the motor carbon brush only falls to the bottom of the lower shell, and turn-to-turn short circuit or blocking of a motor coil cannot be caused, so that the service life of the motor is greatly prolonged, and the continuous operation time and the service life of the electric vacuum pump are prolonged.

Drawings

FIG. 1 is a schematic cross-sectional structure of the present invention;

FIG. 2 is a schematic perspective view of the present invention;

fig. 3 is a schematic cross-sectional view of the mold cavity.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in figures 1-3, a novel electronic vacuum pump comprises a base 1, a motor 2 is installed at the lower end of the base 1, a pump block is installed at the upper end of the base 1, a cavity 3 is formed inside the pump block, a rotor 4 is arranged in the cavity 3, the rotor 4 is connected with a rotating shaft 6 through a connecting piece 5, the rotating shaft 6 is driven by the motor 2 to rotate, the cross section of the cavity 3 is oval, the center of the cavity 3 is positioned on the axis of the rotating shaft 6, a plurality of slots 7 are uniformly distributed on the circumferential surface of the rotor 4, rotary vanes 8 are movably inserted in the slots 7 respectively, an air outlet communicated with the cavity 3 is formed at the upper end of the pump block, an air inlet 9 communicated with the cavity 3 is formed at the lower end of the pump block, an air inlet pipe and an air outlet pipe 10 are connected onto the base 1, the air inlet 9 is communicated with the air inlet, an upper outer cover 11 is arranged on the upper end of the base 1, the pump block is positioned inside the upper outer cover 11, the air outlet pipe 10 is communicated with the inner part of the upper outer cover 11, a lower end cover 12 is arranged on the lower end of the base 1, the motor 2 is located in the lower housing 12, and the motor 2 includes a carbon brush near the lower end of the lower housing 12. The number of the air outlets and the number of the air inlets 9 are two, the two air inlets 9 are respectively close to the long axis end of the oval cavity, and the two air outlets are close to the short axis end of the oval cavity. When the motor 2 drives the connecting piece 5 and the rotor 4 to rotate, the end of the rotary vane 8 is abutted against the inner wall of the cavity 3 under the action of centrifugal force, so that a plurality of sealed working cavities are formed among the cavity 3, the rotor 4 and the rotary vane 8. When the rotor 6 rotates, the rotary vanes 7 near the long axis of the cavity 3 gradually extend out, the working cavity between the rotary vanes 7 gradually increases, and air is sucked from the air inlet 9 to form a suction cavity. At the position close to the short shaft of the cavity 3, the rotary vane 8 is gradually pressed into the slot 7 by the inner wall of the cavity 3, the working space is gradually reduced, and gas is discharged from the gas outlet to become a gas outlet cavity. A section of sealing area is arranged between the air inlet 9 and the air outlet to separate the air suction cavity from the air outlet cavity, and each working cavity finishes two air suction and air outlet processes to finish two working cycles when the rotor 4 rotates for one circle. The carbon brush position of the motor 2 is arranged at the bottom of the lower shell 12 and is far away from a working high-temperature area, heat generated during the working of the vacuum pump is not easy to be transferred to the carbon brush position of the motor 2, the carbon brush frame cannot be deformed, graphite ash abraded by the carbon brush of the motor 2 only falls to the bottom of the lower shell 12, the turn-to-turn short circuit or blocking of a coil of the motor 2 cannot be caused, the service life of the motor 2 is greatly prolonged, and the continuous working time and the service life of the electric vacuum pump are prolonged.

Furthermore, the pump block comprises a ring body 13, an upper cover 14 covers the upper end of the ring body 13, a lower cover 15 covers the lower end of the ring body 13, the air inlet 9 is located on the lower cover 15, and the air outlet is located on the upper cover.

Furthermore, a voice eliminating coil 16 is arranged in the upper outer cover 11, the voice eliminating coil 16 is coaxial with the rotor 4, and the voice eliminating coil 16 is clamped between the upper outer cover 11 and the upper cover 14. The canceling coil 16 reduces noise.

Further, a sealing gasket 17 and a sealing ring 18 are clamped between the lower cover 15 and the base 1, the sealing gasket 17 and the sealing ring 18 are coaxial, an air inlet cavity 19 is formed between the sealing gasket 17 and the sealing ring 18, and the air inlet 9 and the air inlet pipe are respectively communicated with the air inlet cavity 19.

Further, the lower end of the upper outer cover 11 is placed on the packing 17.

Further, the base 1 is connected with the lower end of the upper outer cover 11 through a plurality of screws, the upper end of the lower shell 12 is connected with the base 1 through a plurality of screws, the pump block is fixedly connected with the base 1 through a plurality of screws, and the screws connecting the pump block and the base 1 are sequentially connected with the upper cover 14, the ring body 13 and the lower cover 15.

Furthermore, two sides of the base 1 are respectively provided with a mounting ear 20, the mounting ears 20 are provided with mounting holes 21, and a shock pad 22 is installed in the mounting holes 21.

Further, the base 1 is connected with a plug 23, and the motor 2 is connected with a power supply through the plug 23.

It should be noted that the technical features of the motor and the like related to the present patent application should be regarded as the prior art, and the specific structure, the operation principle, the control mode and the spatial arrangement mode of the technical features may be selected conventionally in the field, and should not be regarded as the utility model point of the present patent, and the present patent is not further specifically described in detail.

Having described preferred embodiments of the present invention in detail, it is to be understood that modifications and variations may be resorted to without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. A novel electronic vacuum pump is characterized by comprising a base, wherein a motor is arranged at the lower end of the base, a pump block is arranged at the upper end of the base, a cavity is formed in the inner part of the pump block, a rotor is arranged in the cavity, the rotor is connected with a rotating shaft through a connecting piece, the motor drives the rotating shaft to rotate, the cross section of the cavity is oval, the center of the cavity is positioned on the axis of the rotating shaft, a plurality of slots are uniformly distributed on the circumferential surface of the rotor, rotary vanes are movably inserted in the slots respectively, a gas outlet communicated with the cavity is formed in the upper end of the pump block, a gas inlet communicated with the cavity is formed in the lower end of the pump block, a gas inlet pipe and a gas outlet pipe are connected to the base, the gas inlet pipe is communicated with the gas inlet, an upper outer cover is arranged on the upper end cover, the pump block is positioned in the upper outer cover, the gas outlet pipe is communicated with the inner part of the upper outer cover, the base lower end cover has the lower casing, and the motor is located the lower casing, and the motor includes the carbon brush, the carbon brush is close to the lower extreme of lower casing.

2. The novel electronic vacuum pump as claimed in claim 1, wherein the pump block comprises a ring body, an upper cover covers the upper end of the ring body, a lower cover covers the lower end of the ring body, the air inlet is located on the lower cover, and the air outlet is located on the upper cover.

3. The novel electronic vacuum pump as claimed in claim 2, wherein a damping coil is provided in the upper external cover, the damping coil is coaxial with the rotor, and the damping coil is sandwiched between the upper external cover and the upper cover.

4. The novel electronic vacuum pump as claimed in claim 3, wherein a sealing gasket and a sealing ring are clamped between the lower cover and the base, the sealing gasket and the sealing ring are coaxial, an air inlet cavity is formed between the sealing gasket and the sealing ring, and the air inlet pipe are respectively communicated with the air inlet cavity.

5. The novel electronic vacuum pump of claim 4, wherein the lower end of said upper external cover is placed on a sealing gasket.

6. The novel electronic vacuum pump as claimed in claim 5, wherein the base is connected with the lower end of the upper outer cover through a plurality of screws, the upper end of the lower housing is connected with the base through a plurality of screws, the pump block is fixedly connected with the base through a plurality of screws, and the screws connecting the pump block and the base are sequentially connected with the upper cover, the ring body and the lower cover.

7. The novel electronic vacuum pump as claimed in claim 6, wherein the base is provided with mounting lugs on both sides thereof, the mounting lugs are provided with mounting holes, and shock absorbing pads are mounted in the mounting holes.

8. The novel electronic vacuum pump of claim 7, wherein the base is connected to a connector, and the motor is connected to a power supply through the connector.